The National Association of County and City Health Officials (NACCHO) is a Washington, D.C.–based organization.

NACCHO provides leadership, up-to-date information, subject-matter expertise, and other resources, including: The history of NACCHO dates to the 1960s, with the formation of the National Association of County Health Officials (NACHO), an independent affiliate of the National Association of Counties.

NACHO combined with the U.S. Conference of Local Health Officers, an organization affiliated with the United States Conference of Mayors, to form the National Association of County and City Health Officials (NACCHO) in 1994.

This unified organization represents counties, cities, city-counties, districts, and townships governmental local health departments.

[1] NACCHO is governed by a 27-member Board of Directors composed of elected health officials, a representative for Tribal health departments, and ex officio members representing the National Association of Counties, of which NACCHO is an affiliate, and the U.S. Conference of Mayors.